The magic of Marc by Marc Jacobs, the designer’s popular secondary line, is not in revolutionary shapes or cuts. It’s in the way he puts it together, as though channeling the wardrobe whims of an imaginary girl whose moods, and outfits, shift from moment to moment. One moment she’s an eccentric, artsy bohemian in a rainbow chiffon dress worn over a mock turtleneck and opaque black tights; the next, she’s dressed for a proper party in a sweet black knee-length dress with tiers of ruffles, or playing the coquette in a red check dress with a sweetheart neckline.

He may pick up a trend, but the Jacobs spin is what makes it inimitable. His skirts, cut slim or with an A-line flare, are done in sassy colors like red, pink, lemon yellow or mint, and paired with boxy cotton motorcycle jackets. Denim always plays a starring role in the Marc show, and this season it showed up in a sexy little spaghetti-strap dress, slim cropped trousers and a zip-front mechanic’s jumpsuit replete with zippers. There were also plenty of the skinny trench coats that have become a signature item, done in traditional khaki but also in eye-snapping yellow or tomato red. The Marc girl can rest assured that, no matter what her mood, she’ll find something to love.